loadb [addr [baud]]
The loadb command is used to transfer a file to the device via the serial line using the Kermit protocol.
The number of transferred bytes is saved in environment variable filesize.
- addr
- load address, defaults to environment variable loadaddr or if loadaddr is not set to configuration variable CONFIG_SYS_LOAD_ADDR
- baud
- baud rate for the Kermit transmission. After the transmission the baud rate is reset to the original value.
In the example below the terminal emulation program picocom and G-Kermit serve to transfer a file to a device.
picocom --baud 115200 --send-cmd "gkermit -iXvs" /dev/ttyUSB0
After entering the loadb command the key sequence <CTRL-A><CTRL-S> is used to let picocom prompt for the file name. Picocom invokes G-Kermit for the file transfer.
=> loadb 60800000 115200 ## Ready for binary (kermit) download to 0x60800000 at 115200 bps... *** file: helloworld.efi $ gkermit -iXvs helloworld.efi G-Kermit 2.01, The Kermit Project, 2021-11-15 Escape back to your local Kermit and give a RECEIVE command. KERMIT READY TO SEND... | *** exit status: 0 *** ## Total Size = 0x00000c00 = 3072 Bytes ## Start Addr = 0x60800000 =>
The transfer can be cancelled by pressing <CTRL+C>.
The command is only available if CONFIG_CMD_LOADB=y.
The return value $? is 0 (true) on success, 1 (false) on error.